Permeability Converter
Convert permeability, a measure of how easily fluid passes through a porous material.
Written by Rahman · Last reviewed
Quick answer
Permeability measures how readily fluid passes through porous rock or soil. The SI unit is the square metre, which is impractically large, so petroleum and groundwater work uses the darcy at 9.869 × 10⁻¹³ m² and the millidarcy. Reservoir rock typically runs from a few millidarcies to several darcies.
| Square metre (m²) | 1 |
| Darcy (D) | 1.013249966e+12 |
| Millidarcy (mD) | 1.013250e+15 |
About the Permeability Converter
Permeability measures how easily a fluid can pass through a porous material such as rock or soil. It is commonly expressed in darcy and millidarcy units.
It is a key property in petroleum engineering, hydrogeology and civil engineering.
Frequently Asked Questions
What is permeability?
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Permeability describes how readily fluids flow through a porous material. High permeability means fluids pass through easily.
What is a darcy?
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The darcy is the standard unit of permeability used in petroleum and groundwater engineering.
Where is permeability important?
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It is critical in oil and gas reservoirs, groundwater flow and the design of filters and soils.